Monday.com Stock Plunges 4.84% on Surging $530M Trading Volume, Ranks 246th in Volume

On October 1, 2025, monday.com (MNDY) closed at a 4.84% decline with $530 million in trading volume, representing an 87.02% increase from the previous day's activity. The stock ranked 246th in trading volume among listed equities. Market participants observed heightened short-term volatility amid mixed technical indicators and evolving sector dynamics.

Recent developments highlighted regulatory scrutiny intensifying across the fintech sector, though specific enforcement actions against monday.com were not disclosed. Analyst commentary focused on macroeconomic uncertainty rather than company-specific fundamentals. Institutional trading patterns showed reduced net inflows compared to prior sessions, with open interest in derivative contracts remaining stable.

For backtesting analysis, precise parameters are required to ensure methodological rigor. Key considerations include universe composition - whether to include all US-listed equities or restrict to S&P 500 components. Position sizing methodology (equal-weight vs. value-weight) and rebalancing frequency must be defined. Transaction cost assumptions require clarification regarding commission rates, bid-ask spreads, and liquidity impact. Performance evaluation metrics should specify benchmark comparisons and risk-adjusted return calculations.

Implementation details must confirm whether to execute at closing prices with one-day holding periods. Data collection protocols need to address whether to exclude ADRs and ETFs. Once these parameters are established, the backtest can be executed with appropriate data tools to generate actionable insights.